Ten largest cities in the world, 1990, 2014, 2050 (projection)
4.1
Percentage of undernourished people by region
4.2
Number and size of US farms, 1940–2010
4.3
Percentage of adults overweight and obese (various countries)
5.1
Top world oil producers, 2017
5.2
US gasoline prices, 1950–2017
5.3
Per capita and total electricity consumption by region of the world, 2016
Acknowledgements
This edition benefited from the substantial research contributions of Brian Farrell (Wealth and Poverty), Monika Shepard (Population), Jason Farr (Food), Carlos Saavedra (Energy), Katherine Liljestrand (Natural Resources and Pollution), and Liz Schmitt (Technology and Sustainable Futures). We would like to thank the following reviewers who made useful suggestions for improving this edition: Dr Laté Lawson‐Lartego, Amanda Davis Edwards, Ed.D. Brian Farrell, Justin Vaughan, Merryl Le Roux, Liz Wingett, Caroline McPherson, and Rajalakshmi Nadarajan.We would also like to thank Wofford College, both for providing author John Seitz
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